I'm not familiar with Youtube, so I came by this link from a friend. I laughed so hard I cried!
It must be from some kind of interview with an SG-1 director or something, but it shows an outtake from filming...and, well, it's just hysterical!
Watch it for yourself...
MacGyver Sg-1 video
"It's amazing what one can do when one doesn't know what one can't do." Garfield the Cat
"Another day, a whole 'nother set of fresh possibilities. I'm a sucker for mornings." MacGyver